However, this year jumpsuits have been added to the dress code. About the change, Ascot Racecourse said: "Fashion and style are an important part of the Royal Ascot experience for all of our customers.

"The annual Style Guide forms a key part of our support for customers to give them inspiration for what to wear to ensure they have a special occasion with us.

Take a look at the fashion guidelines for men, women and children for each of the racecourse enclosures.

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Royal Enclosure

Ladies

Ladies are kindly reminded that formal daywear is a requirement in the Royal Enclosure, defined as follows:

Dresses and skirts should be of modest length defined as falling just above the knee or longer.

Dresses and tops should have straps of one inch or greater.

Jackets and pashminas may be worn but dresses and tops underneath should still comply with the Royal Enclosure dress code.

Trouser suits are welcome. They should be of full length and of matching material and colour.

Jumpsuits are welcome. They should be of full length with regulations matching that for dresses.

Hats should be worn; however a headpiece which has a solid base of 4 inches (10cm) or more in diameter is acceptable as an alternative to a hat.

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Ladies are kindly asked to note the following:

Strapless, off the shoulder, halter neck and spaghetti straps are not permitted.

Midriffs must be covered.

Fascinators are not permitted; neither are headpieces which do not have a solid base covering a sufficient area of the head (4 inches/10cm).

Strapless, off the shoulder, halter neck and spaghetti straps are not permitted.

Midriffs must be covered.

Gentlemen

Gentlemen are kindly reminded that it is a requirement to wear either black or grey morning dress which must include:

A waistcoat and tie (no cravats)

A black or grey top hat

Black shoes

A gentleman may remove his top hat within a restaurant, a private box, a private club or that facility’s terrace, balcony or garden. Hats may also be removed within any enclosed external seating area within the Royal Enclosure Garden.